#-*- coding: utf-8 -*-

#This file is part of pyLot library.
#
# pyLot is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# pyLot is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with pyLot.  If not, see <http://www.gnu.org/licenses/>.

__author__ = u'Pierre Puiseux, Guillaume Baty'
__copyright__ = u"Copyright 2011-2012 (C) andheo, Université de Pau et des Pays de l'Adour"
__credits__ = [u'Pierre Puiseux', u'Guillaume Baty']
__license__ = "GNU Lesser General Public License"

from _pylot.physics.quantity import Quantity
from pyLot.core import etree

class DatumQuantity(Quantity):
  def __init__(self, unit_obj, name=None):
    if isinstance(unit_obj, DatumQuantity) :
      unit_obj = unit_obj.data
      try :
        name = unit_obj.name
      except AttributeError :
        pass
    super(DatumQuantity, self).__init__(unit_obj, name)

  def toXmlElement(self, role=None):
    node = etree.Element(u'value')
    if role :
      node.attrib[u'role'] = role
    node.attrib[u'edit_unit'] = unicode(self.symbol) # unit used by user
    node.text = unicode(self.value) # SI value
    return node

  @classmethod
  def FromXmlElement (cls, node):
    return DatumQuantity(1)


if __name__ == '__main__' :
  pass
